Abstract

Logvinenko [
Perception
31,
201 (
2002)] asserts that Adelson’s wall-of-blocks illusion [
Science
262,
2042 (
1993)], where identical gray-cube surface tops appear to differ in brightness, arises when the surfaces surrounding the cube tops are shadow compatible, creating a concomitant illusion of transparency. We replicated Logvinenko’s main findings in the chromatic domain across three experiments in which observers match cube tops in hue, saturation, and brightness. A second set of stimuli adjusted cone-excitation ratios across the apparent transparency border [
Proc. R. Soc. London
257,
115 (
1994)], which enhanced lightness and brightness constancy but only when the stimuli varied in both chromaticity and intensity.

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